The exception established by the provisions of article 22, paragraph 3 (a), of the Vienna Conventions is explained by the concern to avoid a situation in which the other Contracting Parties to a treaty to which a State withdraws its reservation find themselves held responsible for not having observed the treaty provisions with regard to that State, even though they were unaware of the withdrawal.
La excepción constituida por las disposiciones del apartado a) del párrafo 3 del artículo 22 de las Convenciones de Viena se explican por la preocupación de evitar que los cocontratantes con el Estado que retire su reserva vean comprometida su responsabilidad por no haber respetado las disposiciones del tratado respecto de éste, aun cuando ignoraban el retiro.